package main
import "fmt"

type tmp interface{
	area() float32
}

//接口中可以内嵌接口
type geometry interface{
	// area() float32
	tmp
	perim() float32
}


func main() {
	age := 7

	if age > 6 {
		fmt.Println("age > 6,It's primary school")
	}
	
	if age > 6 && age<=12 {
		fmt.Println("age > 6,<12,It's primary school")
	}

}